MastahP
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Registered: 3rd Mar 06
Location: Roberttown, West Yorkshire
User status: Offline
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I recently took a trip to powerflow n had a dual exit exhaust (cat bk) fitted. It sounds emence but I aint too sure whether Iv lost/gained ne power, Im considerin a sports cat, dunno if itll make a dif Im stil learnin lol. Ne advice from ne1???
PEACE!!!
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csweatherston
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Registered: 16th Jan 06
Location: Devon
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no performance difference.......decat will give u a slight difference
ive had a b&m cat on for 2months now.....waste of doller in my oppinion
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snoop
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Registered: 21st Nov 05
Location: Dudley, West Midlands
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how do i have a full powerflow exhuast including their own sports cat. my mate has standard 1.6 with panel filter. mine is faster so i think they are worth the money.
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MastahP
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Registered: 3rd Mar 06
Location: Roberttown, West Yorkshire
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I read on here sumwhere that anything over a 3inch tailpipe loses 20bhp per inch but that sounds dodgy. I dont get how a bigger tailpipe wud make a dif.
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Tommy
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Registered: 24th Aug 00
Location: Essex, Colchester
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Losses it coz theres not enough pressure
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csweatherston
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Registered: 16th Jan 06
Location: Devon
User status: Offline
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quote:
Originally posted by snoop
how do i have a full powerflow exhuast including their own sports cat. my mate has standard 1.6 with panel filter. mine is faster so i think they are worth the money.
erm....driver?....engine age??....engine condition??..panel filters are sometimes better than shit ind' kits...
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Jake
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Registered: 24th Jan 05
User status: Offline
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quote:
Originally posted by MastahP
I read on here sumwhere that anything over a 3inch tailpipe loses 20bhp per inch but that sounds dodgy. I dont get how a bigger tailpipe wud make a dif.
What cunt said that?
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CorsAsh
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Registered: 19th Apr 02
Location: Munich
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I had a 2.0 16v, then I fitted my 6x4 tailpipe... 8 valves, 800cc and 105bhp fell out 
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MastahP
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Registered: 3rd Mar 06
Location: Roberttown, West Yorkshire
User status: Offline
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So if a big tailpipe looses pressure u recon im defo gonna be loosin power outa my dual exit on my 1.6sport, n if I am how can i gain it bk? Cheers peeps
N Ill av another look for that dude who sed that thing about loosin 20bhp per inch, I thought it sounded wrong!!
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Daniel_Corsa
Premium Member
Registered: 21st Apr 04
Location: Wigton, Cumbria
User status: Offline
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I've got a dual system on my 1.2 8v
The mighty 45bhp corsa was running great until I added them on and it now only produces 25bhp
2 x 3.5" tailpipes
Which by your theory is totally correct 0.5" bigger so therefore I'm loosing 10bhp per side of my xooster
Need to go back to standard and get full power back again
[Edited on 29-08-2006 by Daniel_Corsa]
April '06' Corsasport Feature Car  | Aug '08' Total Vauxhall Feature Car | Spring '09' Fast Car Feature Car
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Jake
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Registered: 24th Jan 05
User status: Offline
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quote:
Originally posted by MastahP
N Ill av another look for that dude who sed that thing about loosin 20bhp per inch, I thought it sounded wrong!!
I had a quick look for it aswell. The stupid twat must have deleted the comment after reading this thread.
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gasman dan
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Registered: 8th Feb 06
Location: dudley, west mids
User status: Offline
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quote:
Originally posted by snoop
how do i have a full powerflow exhuast including their own sports cat. my mate has standard 1.6 with panel filter. mine is faster so i think they are worth the money.
yeah i can vouch for that
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MastahP
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Registered: 3rd Mar 06
Location: Roberttown, West Yorkshire
User status: Offline
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so wat am I loosin then wi my dual exit? I think one side might be blocked off ya know so it cud just be for show but its still conected to the backbox but at the back ov it.
I still dnt get y ya loose power cos its lettin the preasure out more freely.
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Cybermonkey
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Registered: 22nd Sep 02
Location: Sydney, Australia
User status: Offline
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you need moderate back pressure to maintain engine performance, its hard to explain. not too much, not too little. therefore its important not to go mad with the exhaust bore. what have you done with the inlet? because if you only have an exhaust, you may only be producing 1-2bhp more
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crispy
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Registered: 17th Dec 05
Location: stoke-on-trent
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you only need back pressure at low revs. once an engine rises thruogh the revs, back pressure is no longer an issue, and this is where small gains can be made with a free flowing exhaust, as it sllows the exhaust gases to escape more quickly.
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MastahP
Member
Registered: 3rd Mar 06
Location: Roberttown, West Yorkshire
User status: Offline
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Its cat back but im thinkin ov gettin an inlet manifold n maybe decat it. Im unsure wat to do about the induction, cnt decide. n them mantzel things seem to do a gud job but i dunno how crazy I can go without gettin a re-mappable ecu or a uni-chip.
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MastahP
Member
Registered: 3rd Mar 06
Location: Roberttown, West Yorkshire
User status: Offline
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WhOOT
[Edited on 01-09-2006 by MastahP]
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